There's a cruise that you can take as a day trip from Piraeus while staying in the Athens area - it goes to Hydra, Aegina, and Poros. Does anyone know what I am talking about? I know some people who did it and loved it, and I want to do it, too. I want to be able to book it in advance. I can't find anything about the cruise unfortunately! Does anyone know about it and can steer me in the right direction?